body {
    margin: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;

    background: #0f0f0f;
    font-family: Arial, sans-serif;
    color: white;
}

.login-box {
    width: 90%;
    max-width: 320px;
    padding: 30px;

    background: #1a1a1a;
    border-radius: 12px;

    text-align: center;
}

h1 {
    margin-bottom: 20px;
    font-size: 22px;
}

input {
    width: 80%;
    padding: 12px;
    margin: 10px 0;

    background: #111;
    border: 1px solid #333;
    border-radius: 8px;

    color: white;
    outline: none;
}

button {
    width: 80%;
    padding: 12px;

    background: black;
    color: white;

    border: 1px solid #333;
    border-radius: 8px;

    cursor: pointer;
    margin-top: 10px;

    transition: 0.2s;
}

button:hover {
    background: #222;
}

#error {
    color: #ff4d4d;
    margin-top: 10px;
    font-size: 14px;
}


/* =========================================
   RESPONSIVE - PETITS ECRANS (max-width: 380px)
========================================= */

@media (max-width: 380px) {

    .login-box {
        padding: 22px 18px;
    }

    h1 {
        font-size: 19px;
    }

    input, button {
        width: 90%;
    }
}